The abandoned funicular tunnel was a secret base for the BBC during World War II.

17th-century merchants in Bristol nailed their deals by placing money on these pedestals.

An ornate doorway leads to the former site of one of the city's oldest society of merchants.

After protestors toppled a statue of a 17th-century slave trader, the pedestal where it once stood remains unoccupied.

One of Bristol's best-hidden gems has ties to Lord Byron, whence it became the nation's first reformatory school for girls.

This church is said to have connections to the Knights Templars.

A miniature replica of the canine that became the logo for a large recording company.

This girder was hit by a bomb during the Spanish Civil War, but nobody knew about it until 2016.

Designed to celebrate the queen's 40th birthday.

This Grade II Listed Building with an Art Nouveau façade once contained a unique print shop.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

This restaurant's specialty is "a major enigma for food historians."

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

In addition to escorting prospective couples to and from ballrooms, this lane was also a place for gentlemen to settle scores.

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

This scenic cable car ride glides 100 feet above Mexico City.

To make itself stand out in a city renowned for its numerous museums, this photographic archive resorts to immersively-themed exhibitions.

A grand entrance to one of the world's smallest Chinatowns.

A trompe l'oeil mural remembers the original colonial building that once stood here.

This mosaic made out of books represents one of Colonial Mexico's most important literary figures.

A disquieting Aztec sculpture displays hundreds of stone skulls representing the victims of human sacrifice.

This museum houses two of Mexico's most impressive Aztec monoliths.

These spectacular, symbolic serpents lie within the shadow of the Great Temple.

These subterranean models show Mexico City's central square during three different eras.